Organizations migrating their IT environment to Google Cloud face one constant: the connection to the cloud is crucial for performance, security, and continuity. Whether it’s applications, databases, or AI workloads, the way a network is set up largely determines the effectiveness of cloud infrastructure.
Why connectivity matters
Google Cloud offers enormous flexibility and scalability. However, these benefits can only be fully realized if connectivity to Google Cloud is:
- Stable and reliable
- Low in latency
- Sufficient in bandwidth for business applications
- Redundant for failover
- Secure, with encryption and network isolation
For critical systems such as ERP, data platforms, or real-time analytics, this is essential.
Option 1: VPN via IPsec
An IPsec VPN connection is the most accessible way to connect a corporate site to Google Cloud. A secure tunnel is established over the public internet.
Advantages:
- Quick and easy to set up
- Low initial cost
- Suitable for smaller workloads or temporary environments
- Supports dynamic routing via BGP
Disadvantages:
- Dependent on the public internet
- Bandwidth limited compared to dedicated connections
Option 2: Dedicated Interconnect
For organizations requiring high performance and low latency, Dedicated Interconnect is an option. This provides a physical, private connection between a data center and Google Cloud.
Advantages:
- Up to 100 Gbps bandwidth
- Private, non-public connection
- Very low latency
- Ideal for data migrations and heavy workloads
Option 3: Cloud Connect via a partner
When a dedicated connection is not feasible, Cloud Connect offers an alternative. A connectivity partner provides the connection to Google Cloud.
Advantages:
- Flexible bandwidths from 50 Mbps to 50 Gbps
- No direct presence in a Google data center required
- Scalable connectivity without major investments
Dynamic Routing with BGP
Both VPN and Interconnect connections use BGP (Border Gateway Protocol) for dynamic routing. BGP provides:
- Automatic failover
- Multi-region redundancy
- Optimal routes
- Easy scalability
Redundancy: Essential for Cloud Connections
Google recommends a redundant setup with at least two paths. Redundancy can be implemented on multiple levels:
- Link level: two physical connections
- Service providers: multiple carriers
- Technology level: e.g., Interconnect + VPN as fallback
- Medium: fiber combined with wireless backup options
Conclusion
Stable, secure, and redundant connectivity to Google Cloud is essential for making the most of cloud resources. With the right combination of VPN, Partner Interconnect, or Dedicated Interconnect, dynamic BGP routing, and redundancy, the cloud environment becomes reliable and future-proof.
